Chapter Text
Katsuki was anxious to get Izuku in his bed again - to have Izuku’s body pressed against him, to hear the sounds Izuku made - but he was even more anxious about the state of Izuku’s body. He set Izuku down gently on the couch, wrapped the blanket around him, then went to the kitchen to heat up leftovers for Izuku.
Izuku followed Katsuki into the kitchen, still wrapped in the blanket, and sat on one of the stools at the bar counter. Katsuki threw together a quick meal from leftovers - fried rice - and presented it to Izuku a few moments later. He stood silently across from Izuku while he ate, elbows on the counter and head in his hands.
“Are you just going to watch me eat?” Izuku asked between bites. Katsuki nodded. Izuku continued eating.
It was only a few minutes before Izuku finished the meal, and Katsuki took the bowl to the sink and washed it quickly. Before he had set it in the drying rack, he felt Izuku’s arms around him, Izuku’s body pressed to his back.
“I’m so sorry,” Izuku whispered into his ear. He could tell the nerd was crying.
“You don’t have anything to apologize for,” Katsuki responded, turning to face Izuku. “I fucked up. Majorly. I’m sorry.” He bent down to kiss the top of Izuku’s head, then lifted him into his arms and carried him to his bedroom. This was going to be different than last time. It wasn’t just going to be the best the shitty nerd had ever had - it also had to be the kindest and the sweetest. Katsuki wasn’t good at kind or sweet. But he would try, for Izuku.
He lay Izuku down on his bed gently, then held himself over the smaller man, pressing kisses to his face - his nose, his cheeks, his forehead.
Then he pressed his lips to Izuku’s, keeping the kiss chaste. He kissed Izuku again and again, pulling away each time he tried to open his mouth, to deepen the kiss. Katsuki was determined to make this last.
After kissing Izuku a dozen times, he gently tugged at the hem of his shirt, encouraging Izuku to undress. He did the same, and then they sat on the bed, both cross legged, both naked. Katsuki could have stared at Izuku’s naked body for days. His fair, freckled skin, his muscular shoulders, his soft stomach, his strong thighs. He wanted nothing more than to flip Deku over and fuck him hard, to watch his ass jiggle as he thrust into it, to make Deku scream his name - but now wasn’t the time.
Instead, he reached out and pulled Izuku into his lap. The smaller man straddled him, and he felt Izuku’s cock, half hard, pressed against his stomach. He was rapidly becoming hard under Izuku.
Izuku pulled Katsuki closer to him, kissing him. This time, Katsuki let Izuku deepen the kiss. He let Izuku lead, let Izuku win the battle for dominance that they had again and again in every arena.
He was going to let Izuku lead, to let Izuku tell him what he was comfortable with and what he wanted.
Apparently, Izuku wanted it rough.
He pushed Katsuki down, crawling to kneel between his legs and looking hungrily at his hard cock. He bent down and pressed a kiss to its head, and Katsuki couldn’t stop himself from gasping at the contact.
Then Izuku looked up at him and said something that absolutely fried his brain.
“I want you to fuck my face.”
Katsuki was not strong. He desperately wanted this to be sweet and slow and loving, but how could he refuse such a request? Maybe he could lovingly fuck Deku’s face.
“Oh. Okay.” He finally responded when his brain came back online.
“Do you not want to? I don’t know why I asked. You don’t have to.” Katsuki could see that Deku had already started to spiral into his anxious thoughts.
“Hey, Izuku, shh, no, of course I want to. That’s literally the hottest thing anyone has ever said to me. It just took me a second to process. Okay?”
Izuku nodded, but Katsuki could see tears forming in his eyes.
“Come here,” he said gently, opening his arms to pull Izuku into a hug. He held the smaller man tightly, rubbing gentle circles on his back. “I want you, Izuku. I can’t even put into words how much I want you. I’ve thought about you - about this - for years. How do I convince you?”
“I don’t know,” Izuku mumbled into his chest.
Katsuki held Izuku more tightly, then, after a moment of silence, asked, “Is that offer still on the table? Because I can’t stop thinking about the way you would look on your knees, how it would feel - “
Izuku didn’t even let him finish his sentence. He pulled away and climbed off the bed, kneeling on the carpet.
“Oh gods.” Katsuki had never seen a more sinful sight. He grabbed a pillow to slide under Izuku’s knees to ensure he’d be comfortable, then stood in front of him. “Are you sure you want this?”
Izuku nodded, eyes glued to Katsuki’s erection.
“Okay. Pinch my leg if you want me to stop, okay?”
Izuku nodded again, then leaned forward, opened his mouth, and stuck his tongue out a bit. There would be time later for Katsuki to be anxious about how Izuku had gotten so good at this - now, all Katsuki could think of was Izuku’s soft mouth.
He fisted his hands into Izuku’s hair and pushed into his mouth, going slowly so he could stop when Izuku gagged. He didn’t know how rough Izuku liked it, and he wanted to err on the side of being too gentle.
But Izuku didn’t gag. Katsuki pushed until he felt the head of his dick hit the back of Deku’s throat, and he almost came right then.
Izuku was staring up at him adoringly, and he pulled back and slowly fucked into Deku’s mouth again. He continued this, slowly thrusting until he hit the back of Izuku’s throat, pulling out, repeating - until Izuku’s eyes had glassed over. He had seen this before, in other partners, but never so soon, and never from just fucking their face.
A loving feeling bloomed in Katsuki’s chest. Deku really trusted him that much?
“I’m going to fuck your throat, okay, baby?”
Deku nodded and tried to speak, but Katsuki’s dick was still in his mouth. Katsuki pulled out slowly, then grabbed Izuku’s chin and tipped his head up. Katsuki then bent down and spit into Izuku’s mouth. He suddenly felt possessive of the green haired man, and he wanted to claim him in every way. Izuku moaned when Katsuki’s spit hit his tongue, and he opened his mouth wider.
Fuck. Katsuki wouldn’t be able to get it up for anyone else ever again. Not after this.
He kissed Deku’s forehead, then straightened up and thrust back into his mouth slowly.
“Deep breath, baby,” he told Deku before pressing to the back of his throat. When he felt the resistance of Deku’s throat, he pressed harder, until the head of his cock popped into Deku’s esophagus. He pressed the rest of the way in, holding Deku’s face against his groin. He could see the bulge in Deku’s throat.
After a few seconds, he pulled out all the way to give Izuku a chance to breathe.
“Fuck me harder,” Deku whimpered.
Katsuki could do that. He roughly grabbed Deku’s hair, gripping it tightly, and pulled the smaller man onto his cock. He thrust deep into Deku’s throat, pleased to hear him gag a bit this time. Then he fucked his throat roughly, holding Deku’s head still while he thrust in and out.
“You like that? You like it when I use your throat? You fucking slut.” Katsuki hadn’t really meant to say that out loud, but Deku’s moans at hearing it encouraged him. “You’re such a good little slut. You take my cock so well. I’m not going to last much longer,” he groaned, thrusting hard. “Do you want me to cum down your throat?”
Deku moaned around him, trying to nod. And that was it for Katsuki. He pressed in hard one last time, ejaculating down Izuku’s throat. He felt Izuku swallowing around him, and it was all he could do to stay standing through his orgasm. When he was done, he pulled out quickly and sat down heavily on the floor next to Izuku. He pulled the smaller man into his arms and kissed him deeply.
“Was that good?” Katsuki was suddenly worried that he had gone too far. Had he fucked Deku’s throat too hard? Was Deku comfortable being called a slut? Should he have pulled out? He should have asked first, established boundaries before doing things like that.
“It was good,” Deku slurred, pressing himself closer to Katsuki and wrapping his arms around his neck. “I feel so good.”
Katsuki nearly sighed in relief. He had never felt such a desperate need for reassurance before. Why did Deku make him feel this way?
Katsuki stood, lifting Izuku with him, and moved to the bed. They lay tangled together for a few minutes, then Deku untangled himself slightly to kiss Katsuki. The first kiss was sweet and slow, more breathing in each other’s space than pressing lips together. The next kiss was hungry - Deku shoved his tongue into Katsuki’s mouth, exploring deeply. Katsuki could taste himself on Izuku’s tongue, which he had never really liked before now. Something about doing this was Izuku was different than any time he had slept with anyone before - everything was so much hotter, so much more intense, so much better. Izuku pushed Katsuki onto his back and climbed on top of him, not breaking the kiss.
Katsuki’s dick was half hard by the time Deku pulled away to breathe, and he was surprised by how quickly he was hard again. He had always been one and done in the past, but everything with Izuku was different.
“What do you want?” Katsuki asked. It had been less gentle than he planned, but he still wanted it to be centered on Izuku.
“Want you to fuck me,” Deku mumbled into his chest.
“Oh, fuck, yes. Let me prep you first.” Katsuki slid out of Izuku’s arms to fumble around in his nightstand for lube, then repositioned Deku to be on his knees with his face down and his ass up. More often than not, this was the position Katsuki dreamed about Izuku being in. He dreamed about slapping Izuku’s fat ass, about fingering his pretty, pink asshole, about watching his dick push in and out of the tight ring of muscle. He needed to watch Deku’s luscious ass while he fucked him.
“Is this okay?” He was almost timid now, after worrying he had gone too far before.
“Yeah,” came the muffled reply. Izuku had buried his head in the pillows.
Katsuki took a deep breath, then leaned down and pressed a kiss to the soft skin of Izuku’s thigh. He kissed the other thigh, then pressed kisses to each freckle on his ass. There were a lot of freckles. By the time Katsuki’s mouth found Izuku’s hole, Izuku was begging him to hurry up. But he wanted to savor this.
Katsuki licked over Deku’s hole, gently kneading his thighs before pulling his cheeks apart and pressing his tongue into Deku. The ring of muscle was tight, and Katsuki could feel Deku clenching. As he slowly began to tongue fuck him, he felt Deku begin to relax. By the time Katsuki slid his first lubed finger into Deku, his hole was relaxed and pliant. It was only a minute before Katsuki was able to add a second finger. He began probing, looking for the spot that would make Deku moan high and needy. After finding it, he rubbed hard circles, not stopping even when he heard Deku whimpering. He wanted Izuku to come at least as many times as he did.
Katsuki pressed in a third finger and rubbed against that same spot, and it only took a few seconds before Deku was moaning loudly, arching his back, and coming onto Katsuki’s sheets. Katsuki was surprised to find that he wasn’t even worried about the mess. He had always been compulsively clean, but he was more worried about wringing more moans out of Deku than immediately changing the sheets on his bed.
“Can I keep going, baby?” Katsuki asked gently. He disgusted himself with his use of the pet name, but it felt so right in that moment.
“Yes,” Izuku moaned, his voice muffled by the pillow. Katsuki continued to fuck three fingers into and out of Izuku’s ass, listening carefully for any sound of discomfort at the overstimulation. But Izuku continued to whimper and moan, pressing back onto his fingers as he pressed them in. He fingered the smaller man until he was a trembling, whimpering mess, practically begging for Katsuki to fuck him.
“Tell me what you want, Deku.” Katsuki’s voice held none of its usual anger - just softness for the man under him.
“Please, Kacchan, please, fuck me, I want you to fuck me, I want to feel you inside me, please, please, fuck me, fuck me, fuck me” Deku was rambling now, begging in earnest, and Katsuki could have listened to it for hours. But he wasn’t going to torture Deku that much. Not this time, at least.
“Do you want me to wear a condom?” He wasn’t sure why he even asked - he was sure Deku would say yes. They weren’t at that point yet, they couldn’t be, not the second time they ever had sex.
“No, no, no, wanna feel you, want you to come inside me, want you to fill me up with your cum,” Deku was practically slurring his words, basically putty in Katsuki’s hands, one of which was still thrusting in and out of Deku’s ass.
“Are you sure, baby?” The pet name felt almost too right, and Katsuki filed that away for later.
“Yes, please, yes, Kacchan, please.” It almost sounded like Izuku was crying. And, of course, Katsuki thought that was hot.
“Okay, baby, anything for you.” And he really meant that.
He pulled his fingers from Deku’s hole, watching how it clenched around nothing, waiting for him to penetrate it, and rubbed the remaining lube from his fingers onto his dick. He poured a little more onto the head, then kneeled behind Izuku. He looked so perfect like this - head down, ass up, back arched just the way Katsuki always imagined.
“Tell me to fuck you.” Katsuki commanded. He had gotten tired of asking Izuku what he wanted, and he wasn’t even sure Izuku had enough brainpower to answer at this point, but he needed to hear the man below him say it.
“I want you to fuck me, Kacchan, please, I need you inside me, please fuck me.” Deku always went above and beyond what Katsuki was expecting.
Katsuki bent down, his dick sliding into the cleft of Izuku’s ass, and pressed warm kisses along his spine. “I’ve got you, baby. I’m gonna fuck you so good.” Then he sat back up and pressed his dick into Izuku’s hole. He slid in steadily, not stopping until he was fully seated inside, and even then only for a second. He pulled out quickly and set a brutal pace, fucking into Izuku hard, then pulling out slowly to repeat. He quickly found Izuku’s prostate, but made sure to only press into it every few strokes. He wanted this to last, wanted to show Izuku how good it could be. Katsuki struggled to push away the fear that it wasn’t that good, that Deku had had better already, that he wasn’t proving anything, but he focused on the way Izuku’s ass jiggled while he railed him, and that helped.
It also helped that Deku wasn’t silent for a second. He whimpered, moaned, and babbled about how good it felt, encouraging Katsuki to fuck into him harder.
On impulse, Katsuki spanked Izuku, just lightly, and was surprised by the deep moan that it pulled from Izuku’s chest. “You like that?” Deku moaned again. “You’re such a good little slut. My good little slut. You’re taking my dick so well, almost like your ass was made just for me.” Now that he had started talking, he couldn’t stop. “You feel so good, so hot and tight, just for me.” He spanked Izuku again, harder this time, then bent down to press his mouth to Izuku’s ear.
“Does that feel good, little slut?” He breathed into the smaller man’s ear, punctuating his sentence with a hard thrust against Izuku’s prostate.
“Yes, yes, Kacchan, you feel so good, don’t stop,” Izuku breathed, barely loud enough for Katsuki to hear it.
“I won’t.” He would do anything Izuku told him to.
After a few more hard thrusts and sharp smacks to Izuku’s ass, he was begging Katsuki to make him come.
“Please, please, Kacchan, need to come, I need to come, please, please, please.”
“Not yet,” Katsuki responded, reaching around to hold the base of Izuku’s cock tightly. “Wait for me. I want you to come with me, baby.” He was saying it too often now, but he didn’t have time to overanalyze. He slowed his pace, focusing on fucking Izuku deep and hard until he was about to come.
“Okay, baby, come for me.” He stroked Deku’s cock in time with his thrusts, rubbing his palm over the head until he felt Izuku’s body contracting and liquid spilling over his hand. He pressed into Izuku one more time, relishing the tight, wet heat, then came deep into him, crying out his name as he did.
Both were still for a moment after their release, enjoying each other’s heat and skin contact. Then Katsuki collapsed onto Izuku, not bothering to pull out. Even as his erection waned, he liked the feeling of being connected, the feeling of being one. Izuku didn’t complain, just collapsing flat onto the bed under him. It was barely a minute before Izuku began to complain about laying in his own cum, and Katsuki slowly pulled out and climbed off the bed.
“Let me clean you up,” he said, pushing Izuku back onto the bed. “Let me take care of you.” Katsuki hurried to the bathroom, where he began drawing a bath and dampened a washcloth, then returned to wipe Izuku down gently. He lifted the (much) smaller man into his arms, feeling a pang of anxiety at the thought of Izuku withering while he ignored him for days on end, then held him tightly to his chest with one arm while he stripped the sheets off the bed. He was still Katsuki after all - he couldn’t have semen leaking into his mattress. Not even if it was Deku’s.
He carried Izuku to the bathroom, tested the temperature of the water, then eased them both into the bathtub. He pressed kisses to Izuku’s shoulders and the top of his head while he gently scrubbed the rest of his body with soap, then rubbed his shoulders until he was pretty sure Izuku was asleep. Only then did he slip out of the bathtub to grab towels. He rinsed himself, keeping an eye on Deku in the bathtub, then dried himself off before doing the same to Izuku. He carried him back to his bed, and this time he lay beside him, holding him close. This was much better than retreating to the couch.
They would have to talk in the morning, and figure out what they were doing, but everything felt so right in the moment. Katsuki wished he hadn’t wasted so much time with his fears and had just let Izuku talk to him. But now that he had the smaller hero, he wasn’t letting go. He wrapped his warm body around Izuku’s and closed his eyes, drifting into his first night of dreamless sleep in a long time.